Over time, civil society organizations are increasingly recognized as equal institutions in the provision of services for children. Families and schools are turning to them more and more. The Government supports their work and recognizes their importance as well. They are the link between the state and society, in what way and with what resources will be shown here. The work of civil society organizations relies mostly on mutual assistance, the community and turns to the state as a partner. Although increasingly accessible and accepted, the role of civil society organizations is still difficult to recognize, as is the influence they have. Focusing on the importance of interdepartmental cooperation and what it means for organizations working with children, the obstacles it encounters will be pointed out. By reviewing the available literature, this paper will show how the work of organizations in the field of child protection is supported and what their role is. The field of child protection is very broad, and some of it will be shown by examples from practice on the territory of the Republic of Croatia. Children with mental health problems, unaccompanied children and children with developmental disabilities are areas that make this paper relevant. These areas are recognized as current risks that are important to influence as much as possible. Based on all of the above, the goal of this paper is to make the work and the role of civil society organizations in working with children more visible.